Coil-spreading machine



May 31 1927.

S. H. BROWNING COIL SPREADING MACHINE 3 Sheets-Sheet Filed Feb 10, 1925 INVENT OR WITNESSES ATTORNEYS May 31, 1927.

s. H. BROWNING COIL SPREADING MACHINE Filed Feb. 10, 1925 3 Sheets-Sheet 2 y 927 s. H. BROWNING COIL SPREADING MACHINE Filed Feb. 10, 1925 a Shoots-Sheet 3 INV NTOR BY I M M w ATTORNEYS 'Patente d May 31, 1927.

UNITED STATES SAMUEL H. BROWNING,

OF ATLANTA, GEOBGIA.

'COIL-SPREADING MACHINE.

Application filed February Generically this invention relates to machines for forming or shaping electric conducting coils for electrical apparatus such as armatures and stators for dynamo electric machines, but it more especially comprehends novel improvements on my patent for coil shaping machine, No. 1,297,998.

one object of this invention is the provision of an improved coil holder with its vise or gripping members variously adjustable and embodying novel means for maintaining the said members 'in any desired relative position, so as to firmly grip and hold the wires in a square rectangular bundle during the bending process.

Another object of this invention is the provision of an improved end loop clamp or knuckle holder for holding, firmly gripping and properly shaping the loop end of the coil. during the spreading process, the said holder being rotatably adjustable to form a properly shaped knuckle or loop at each end of the coil and at any desired angle with respect to the body of the coil.

A further important object of this invention is adjustable means for effecting elevation and lowering of the coil ends during the spreading operation.

Another important object of this invention is the provision of means for simultaneously and automatically lowering the top or rear coil holders to a point where the bottom of the slot portion of coil grip in rear holders will come to the same distance from center of rotation as the top of the slot portion of coil grip in the front or opposite holders during the spreading operation, thus produ '--g the correct pitch to the side or slot portions of the coil. and returning the said rear holders to their initial position overlying the front or opposite holders when in closed or loading position.

A still further object of this invention is the provision of a loop gauge, designed for use in gauging the distance of inside of loop end from side of holder. including means for setting the gauge so that any number of coils may be secured in the holders quickly and expedi iously without further measurements or setting.

Other objects of this invention are: to provide a spreader embodying the above-specilied features, so designed as to produce coils tiIQiI-lflllii, pre ent melding 10, 1925. Serial No. 8,283.

of long coils between the holders, capable of being quickly and accurately adjusted, thereby increasing rapidity of operation and effecting economy in labor, simple in construction and manufacturable at a reasonable cost. v

l Vith these and other objects in View, which will become apparent as the description proceeds, the invention resides in the construction, combination and arrangement of parts, hereinafter more fully described and claimed, and illustrated in the accompanying drawings, in which like characters of reference indicate like parts throughout the several figures, of which:

Fig. 1 is a front perspective view of my improved coil shaping machine;

Fig. 2 is a fragmentary front elevation of the machine illustrated in Fig. 1;

Fig. 3 is an endelevation of the machine in closed or loading position, the arms in open or spreading position being shown in dotted outline;

Fig. 4 is a fragmentary end elevation of the supporting'frame showing the pedal and center pull rod;

Fig. 5'is a detailed fragmentary sectionized view of one of the rear coil holder supporting bar shifting assembly;

Fig. 6 is a side elevation of one of the coil holders;

Fig. 7 is a front elevation of'Fig. 6;

Fig. 8 is a rear elevation of Fig. 6;

Fig. 9 is a top plan view of Fig. 6;

Fig. 10 is a top plan view of one of the knuckle holders or end loop gripping members;

Fig. 11 is a side elevation of Fig. 10;

Fig. 12 is a sideelevation of the loop gauge; and

Fig. 13 is a front elevation of Fig. 12.

Fig. 14 is a view of the loop before spreading by applicants machine; and

Fig. 15 is a view of the loop after having been spread by applicants machine.

In the illustrated embodiment characterizing this invention there is shown a frame 1 cmbodyingcross bars 2 and 3, diagonal braces 4- and longitudinal bar 5 connecting the two rearlegs. Seated on the bars 2 intermediate theirv length is a longitudinal guide bar 6, and similarly mounted on the cross bars 3 upper guide bar 7 with its ends beyond the bars 3 aperturcd to receive the vertical pull rods 8, the lower ends of said rods carrying the swinging longitudinal bar 9.

Hingcdly secured to the rear bar 5 as at 5 is the pedal pivotally connected intermediate its length to the vertical pull rod 11 extending through apertures in the bars 6 and 7, retained in position and limited in its downward movement by the adjustable nut 12, said rod 11 being connected to the movable bar 9 by a pin 13 or other fastening means. lrlounted on the frame 1 is the table 14 secured thereto in any suitable manner, and in order to strengthen the bar 7, bracing rods 1? are provided on either side of rod 11 connecting the table 14 and bar 7 secured to the respective parts in any conentional manner.

The bar 9 is normally maintained in ele vated position by the duplex coil springs 16 attached to each end thereof and to the table.

A pair of bearing members or Crowfoot castings 17 are mounted on the table 14 slightly spaced from either end, secured thereto by bolts 18 and'adapted to support and rovide bearin s for the lon itudinal center rod 19. Apairof substantially L- shaped oscillating arms and 20 are mounted on the said rod 19'at either end adj acent the members 17 each of the said arms 20 and 20 also beingfifor'med with lateral projections 21 and 21 which are connected by the rods 22 and 22. The arms 20 adapted to oscillate to the front of the center bar 19 are connected by the longitudinal angle bar 23 which is slidably mounted on the rods 22 for vertical adjustment and secured in any desired position by the set screws 24. The arms 20 adapted to oscillate to the rear of the center bar 19 are connected by the rear longitudinal angle bar 23 slidably mounted on the rods 22 for vertical adjustment. but unlike the front anglebar23 which is tisedly secured to the rods 22 according to any desired adjustment, the rear angle bar 23 is mounted on the said rods 22 adapted for reciprocating movement during the operation of the machine within certain limits, the range of movement being determined by the adjustable spaced collars 25 and 26, respectively, secured to the said rod 22 by set screws 27. The auton iatic reciprocation of the said bar 23 is cficoted by th rods (1 extending through the slots 7) in the table 14 which have their upper ends hingedly connected to the angle bar 23 as at c with their lower ends extending through swivel bearings (Z secured to the movable longitudinal pull bar 9, and having secured thereon bottom adjustable collars 0 adapted to contact with swivel bearings (Z when spreader is open at finish position of coil. This assures lowering of 23 to contact with 26. The said rods a also being provided with compression or shock absorbing springs f with their lower ends adapter to seat on the said swivel bearings (Z and their upper endsconlined by the adjustable collars g secured in position by the set screws 72 The table14 and the members 1.7 are suitably apertured to receive the vertical pull rods 8, the said members 17 acting as guide bearings for the said rods which carry at their upper ends the yoke 23 pivotally secured to the upper ends of the oppositely extending links 29, the lower extremities of the said links being pivotally mounted on the lugs or bolts 30, which are threadedly or otherwise suitably secured to the respective arms 20 and 20 intern'iediate their length. The members 31 are adapted to space the links 29 from the arms 20 and and may be integrally connected to said arms intermediate their length and epertured to threadedly receive the bolts 30 or they may be in the nature of spacer washers with the bolts 30 threadedly engageable with the said arms, if desired.

Mounted n the said rod 19 on either side of center bearing 32 are the horizontally slidablesleeve members 33 adapted to receive and support the lower ends of vertical rods 34 which are maintained in vertical position by having their upper ends dctachably connected to coil springs 35 carried by collars 36 longitudinally slidable on rod 37 supported by the upper ends of upright standards 38 secured to the crowfoot hearing members 17 by bolts 39.

The L-shaped anchoring members 40 are slidably positioned on the vertical rods 34, their limit of vertical adjustment being governed by collar 41 fixedly secured to the said rods by set screws 42, and U-shaped collar 43 secured by set screws 44' in any desired position on the said rods 34. The U- shaped collars 43 carry pinions 45 adapted to mesh with rack 46 fixedly secured to member 40, said pinions being operated by handles 47 for the vertical adjustment ot the said mei'nbers 40.

The loop end gripping members or knuckle holders A are adapted to be adjustably positioned on the Lettensions of the members 40 either fixedly or rotatably secure-d thereto by the set screws '48 extending through the slots 49 which limit the rotatable movement ot the said holders. Each of the holders A are vtormed or two complemental parts or plates 50 and 51. Plate 50 constitutes the main body of the holder and is provided with adjusting pin 52 pivotally connected to plate 51 as at 53, said pin being internally threaded toreceive the externally threaded adjusting screw 54, for parallelly varying the opening between the gripping faces of the plates 50 and 51, said screw 54 being locked in any desired position by the lock screw 55 inserted in a threaded opening in plate at right angles to the screw The outer extremity'ol plate 50 is formed with a right angular hook or born 56 designed for insertion in the loop end of the coil B and adapted to fit into slot 57 of plate 51 when the plates are in clamped position, for holding the wires in tact and rendering it possible to spread. the coil B to form the coil C with perfectly shaped loop or knuckle C at each end, without the necessity of pretaping or dipping to hold wires together. The members 50 and 51 are further retained in closed position by the threaded T-head bolt 58 supported by nut 58 which is engaged by the oppositely extending pointed bearing screws 59 and operated by handle 60. When the handle is in a vertical position the T-head of the bolt will pass through a vertical oval slot in rear olate 50, after which a quarter turn to the left causes the T-head to ride up over the several sides of oval hole, thereby exerting a clamping action on a loop which is retained by the loop engaging ends of the clamping plates 50 and 51.

Slidably mounted on each of the horizontal angle members 23 and 23 are a plurality of coil holders or composite Vises 61, and as all of these holders are identical, for convenience in description, only one will be de scribed in detail. Coil holder 61 is formed with a triangular opening 62 adapted to receive the angle bar 23 and is secured at any desired position thereon by locking screw 63 provided with block or gib 64 for contact withthe angle bar 23 on its inner surface and equipped with hand wheel 65 on its outer end. The holder 61 is recessed substantially throughout its height so as to receive and permit vertical and horizontal adjustment of the vise jaw members 66 and 67, respectively. In order to prevent springing or wabbling of the jaw 66 when subjected to pressure the vertical projections or shoulders 68 and 69, respectively, are provided for a snug sliding contact with the front and rear faces, respectively, of the body portion 61.

Guide block 70 is machined U-shaped and looks over the vertical extension of vise jaw 66 at rear of holder, being fastened to jaw 66 by pin 71 and screw 72.

The other extremity of member 66 terminates in depending bifurcated right angular portion 73 which is adapted to engage the T-head 741- of the integrally formed lateral coil supporting shelf or anvil extension of thebodyportion 61 which also supports the slidable member 67, the said member termiuating in an upward extension 75 extending through a slot in the member 66 and the lateral lugs 76 which with the extensions 75 forms the vise face of the member 67 and also limits the retractile movement of the said member. The member 67 is internally threaded to receive the threaded'adjusting screw 76 provided with collar 77 secured as at 78 and bevel disc 79 adapted for engage ment with the beveled portion of the pressure screw 80 carried by guide block 70 and which may be locked in any desired position, by lock screw 81. The free extremity of screw 76 is provided with operating knob or hand-wheel 82. The said member 67 is centrally slotted to receive retaining pin 83 secured to the body 61 by taper pin 84-.

Secured to the upper vise member 66 by taper pin 85 is the perpendicular rack 86 adapted to mesh with the pinion 87 carried by the upper end of 'bOC y portion 61 and operable by handle 88 to raise and lower the said member 66. In order to lock the member 66 in clamping position when the rack 86 is down, a yoke 89 hingedly secured to the topfof body portion 61 as at 90 and carrying lock screw 91 provided with operating knob 91? for locking rack 86 in depressed position when the'yoke has been brought directly over same. The said yoke assumes operative position through the instrumentality of coil springs 92 securedto the said yoke as at 93 and to the holder 61 as at 94.

Positioned on the front angle bar 23 adjacentone of the holders 61 is the slidable' loop gauge 95 comprising a triangular frame formed with spaced upstanding ears 96apertured to receive loop gauge pin 97 carrying operating handle 98. Mounted on the said pin 97 intermediate the said ears 96 is the compression spring 99 with one end seating against thewasher 100 formed with slots 101 in which are adapted to selectively seat key pin 102 which determines the angle of adjustment of the gauge pin 97. The frame 95 is secured to the angle bar 23 similarly to holders 61 by locking screw, 103 with its inner end carrying gib 104 and its outer end provided with operating knob 105. The loop gauge 95 like the coil holders 61 is adjustable on angle bar 23 according to gradualions thereon.

Operation.

- The operation of the machine constructed as above described, is as follows:

The holders 61 are properly positioned ac cording to the graduations on longitudinal adapted to extend through the end of the ,z;:.

loop and when coil has thereby been properly gauged the said pin is pulled forward which removes it from the loop permitting it to drop downward out of the way. Then the rear holders carried by bar 23 being slightly lllll higher than the front holders so that their vise members are adapted to overlie those of said front holders, are adapted to be clamped on the upper portion of said coil, after which the right and left hand knuckle holders A are adapted to clamp the loop ends of the coil which is effected by placing the loop ends over the horn or hook members 56 of the plates 50 and clamped between the plates 50 and 51 by the proper adjustment of adjusting screws 54 and T-head bolts 58, whereupon the loading operation is complete and the machine is then ready for the spreading operation which is effected by the manual downward operation of pedal '10 which depresses bar 9 attached to pull rods 8, which, through the instrumentality of links 29 attached to arms 20 and 20 oscillate the same outwardly together with the longitudinal bars 23 and 23 with their respective holders 61, spreading the coil loop B firmly gripped by the said holders to conform to the desired configuration C shown in Fig. of the drawings, the rear bar 23- being automatically lowered to rest on step collars 26 when the bars have reached their limit of separation, through the instrinnentality of rods a which have their upper ends connected to said bar 23 and their lower ends-to swivel bearings (Z secured to swivel bearings (Z attached to pedal bar 9.

The said collars 26 are so located in the set-up of the machine that in open or spread. position the lower side of rear half of coil will be at the same radius from center of'rotation as the top side of front half of'coil. The center of rotation thus represents the center of motor for which the coil is being made, and the respective positions of the slot portions of the coil are then at exactly the same. distance from the center of rotation that they occupy when inserted in the motor, and the action of the machine insures that the proper pitch or angle will be produced on these portions of the coil.

lVhen the pedal is released the pedal bar 9 is returned to normal position by the springs 16 and the bar 23 is automatically elevated so that the holders 61 carried thereby will overlie the holders carried by bar 23 when they again assume loading position.

While the oscillating arms 20 and 20 and bars 23 and 2 5 are in open or spreading position the knuckle kick up or end loop forming: attachment may behelevated or lowered to provino the proper angle of the end loops with respect to the body of the coil, which as above stated, may be accomplished during the spreading operation, after which the holders and knuckle members may be loosened and the finished coil removed, whereupon the machine may be returned to loading or closed position as in the first instance.

I have described broadly the operation of the machine forming the subject matter of this invention, and as the operation of the various parts is thought to be clear from the detailed description, further explanation is deemed to be unnecessary.

Although in my previous invention, namely, Patent No. 1,297,998, was a step in advance of the art, nevertheless, after much practice and experin'ientation I have evolved certain refinements enabling; simpler and more accurate adjustment of parts includ ing the manner of adjusting; the angle bars 23 and 28, the manner of constructing the oscillating arms, the improved loop end or knuckle holder structure, increasing the adjustability and intiproving the structural design of the coil holders, and have added other important features, such as the kick up attachment for n'operly shaping the loop ends, and the automatic adjustment of the top or rear bar 23' with respect to the front bar 23, and thereby have evolved a coil shaper or spreader eliminating the deficien cies of those heretofore in use, of great adaptability, etlicient to operation, and'yet manufacturable at a reasonable cost.

In practice, I have found the form of my invention illustrated in the accompanying drawings and referred to in the above description, as the preferred embodiment is the most efficient and practical; yet realizing the conditions concurrent with the adoption of my machine will necessarily vary, I de sire to emphasize that various minor changes in details of construction, proportion and arrangement of parts, may he resorted to within the scope of the appended claims without departing from or sacrificing any of the principles of this invention.

Having thus described my invention, and without enumerating variations and equivalents, what I desire'protected by Letters Patent is as set forth in the following claims:

1. A coil shaping machine comprising means for gripping the ends of a wire coil loop, a plurality of means for gripping and holding each side of the loop, operating means for simultaneously moving the holding'means on'the respective sides away from or towards each other; of means cooperating with the operating means to raise and lower the holders on one side of the loop with respect to the holders on the other side;

2. A cell shapingmachine including" a bed structure, oscillating arms carried by said structure, means connecting the opposing; pairs of said arms, said means carrying a plurality of coil holders, end coil loop holders or knuckle forming members, manually operated means carried by said bed structure for oscillating the said arms and their respective connecting means, the said manually operated means also simultaneously and automatically efifecting vertical adjust ment of the holders on one side of the loop with respect to those on the other.

3. A coil shaping machine comprising a the said bed structure, longitudinalbars the opposing pairs of said arms slidably adjustable thereon, a plurality 0r holders carried by said bars, operating means for simultaneously moving the bars and'their respective holders away from and towards each other; of means simultaneously coopcrating with the operating means for rais ing and lowering one of the bars with respect to the opposite bar during. thespreading operation.

5. A coil shaping machine comprising a bed stnicture, a center bar carried by said structure, a pair of coil loop end gripping means slidably mounted on said bar, oscillating arms rotatably carried by said rod, longitudinal bars connecting the opposing pairs of said arms, a plurality of coil holders slidably adjustable on said bars, operating means for simultaneous outward and inward oscillation of the respective arms and bars, additional means simultaneously op erable by the operating means for raising and lowering the top or rear bar with respect to the opposite or frontbar during the oper-.

ation of the machine.

6. A coil shaping machine comprising away from each other; of means coacting with and operable by the operating means for raising and lowering during the closing and spreading operations, respectively, one of the angle bars with respect to the. other.

7 A coil shaping machine comprising a bed structure, a center rod carried by said structure, vertical supporting rods adjustable on said center rod, coil loop end clamping members or knuckle holder structures, means carried by the said rods coacting with means carried by the holder structures for eitfecting vertical adjustment of the said holder structures, a plurality of means for gripping and holding each side 01" a coil loop, operating means for simultaneously moving the holding means on the respective sides away from or towards each other..

8. A coil'shaper comprising a bed structure, a longitudinal center rod carried by said structure, vertical supporting rods adjustably carried by said center rod, coil loop end clamping member or knuckle holder anchoring elements adjustably mounted on said supporting rods, coil loop end clampi g members or knuckle holders rotatably adjustable on said anchoring elements, said knuckle holders embodying complemental clamping plates parallelly adjustable with respect toeach other, one of said plates beingprovided with means for insertion in the end loop or" the coil, a plurality of means for gripping andholding each side of a coil.

loop, operating means for simultaneously moving the holding means on each side of the loop away from or towards each other.

9. A coil shaping machine comprising means for gripping the ends or a wire coil loop, a plurality of holders for gripping and holding each side of the loop, each of said holders embodying a pair of adjustable vise or gripping jaws, means for eifecting relative vertical and longitudinal adjustment, respectively, of the said jaws and means for locking the said jaws in clamping position, operating means for simultaneously moving the holders on the respective sides of the loop away from or towards each other; of means cooperating with the operating means to raise and lower the holders on one side of the loop with respect to the holders on the other side.

10. A coil shaping machine comprising a supporting structure, means carried by said structurefor gripping the loop ends of a wire coil, said means being longitudinally, vertically and rotatably adjustable with respect to saidcoil, a,plurality of holders for gripping and holding each side of the loop, said holdersbeing longitudinally and vertically adjustable with respect to the said loop, operating, means for simultaneously moving the holders on the respective sides of the coil towards or away from each other, means cooperating with the operating means for raising and lowering the holders on one side of the loop or coil with respect to the holders on the other side.

11. A coil shaping machine comprising ad justable means for gripping and holding the end'loops of awire coil, a plurality of coil holders for gripping engagement with each side of the coil and vertically and longitudinally adjustable with respect thereto, of means for gauging the distance of inside of loop from holder obviating the necessity of adjusting the holders of each coil, operating means for simultaneously moving the holders on the respective sides of the coil towards or away from each other, and means cooperating with the operating means to raise and lower the holders on one side of the coil with respect to those on the other side. I

12. A coil shaping machine comprising a supporting structure, a center bar carried by said structure, a pair of vertical supporting rods slidably mounted on said bar, an upright frame structure carried by the supporting structure carrying depending coil springs attachable to the upper ends of the supporting rods i'or maintaining the said rods in vertical position at any desired longitudinal adjustment on said center rod, loop end gripping members or knuckle holders carried by the vertical supporting rods, a plurality of holders for gripping and holding each side of the coil, operating means for simultaneously moving the hold-' ers on the respective sides towards or away from each other, of means coactlng with the operating means for raising'and lowering the holders on one side of the coil with re spect-to the holders on the opposite side.

13. A coil shaping machine comprising a supporting structure, oscillating arms carried by said structure, longitudinal bars connecting the longitudinally opposed pairs oi said arms slidably adjustable thereon, a plurality of coil holders carried by said bars, end loop holders or knuckle forming memhers, means for effecting vertical and rotatable adjustment of said knuckle holders with for simultaneously moving the bars and their respective holders towards and away front their respect holders towards and away from each other, and additional n'ieanscooperat- ,ing with the operating means for raising and lowering one of the bars with respect to the opposite bar during the spreading operation.

SAMUEL H. BROYVN 1N6. 

